The Collaborative International Dictionary
Clumpy \Clump"y\, a. [From Clump, n.]
Composed of clumps; massive; shapeless.
--Leigh Hunt.
Douglas Harper's Etymology Dictionary
1820, from clump (n.) + -y (2). Also noted 1881 in an Isle of Wight glossary as a noun meaning "a stupid fellow." Related: Clumpily; clumpiness. Compare also clumperton "clown, clodhopper" (1530s).
Wiktionary
a. 1 forming or tending to form clumps 2 resembling a clump 3 clompy; with heavy footfalls
Usage examples of "clumpy".
Mary in a brown serge and clumpy boots than it is in the soft, fluffy things Marie used to wear.
By noon I was simply crazy with my stuffy, long-sleeved, high-necked blue gingham dress and my great clumpy shoes.
It was hard to make out marks in the clumpy, dry earth, but there were depressions that looked like footprints, scuffed areas, places where clods had been overturned, showing their dark undersides.
The grass smelled like Earth grass, but the clumpy bushes along the creek were an odd saffron color.
The human brain is made up of approximately 84 quintillion molecules that are woven together in incredibly complex strands and ribbons of clumpy gray goo.
Kaiser appraised the clumpy object wrapped in oilskin that sat on the passenger seat.
She was still using that clumpy greasy old mop of brownette to hide her face, but she spoke with a certain quiet authority, all the same.
The clumpy mist with its eye-greens was on the move again, like before.
Her lashes stood out in thick, clumpy spikes, and whenever she blinked, her upper and lower lashes wanted to stick together.
It was hard to make out marks in the clumpy, dry earth, but there were depressions that looked like footprints, scuffed areas, places where clods had been overturned, showing their dark undersides.
The spark was surrounded by a flattened cloud, dull red, inhomogeneous, clumpy.
She was wearing a very expensive pink T-shirt, pinched from Maud at half-term, over which all her friends had written messages in biro, a puffball skirt, laddered tights and black clumpy stompers, and was now eating muesli out of a cup with a teaspoon.
She was wearing peacock feather earrings, a black and white sleeveless T-shirt, a black Lycra mini which just covered her bottom, laddered black tights, huge black clumpy shoes, all of which belonged to various friends of hers, a great deal of black eye make-up, and messages in Biro all over her arms.
She had on white shoes with round toes and rather old-fashionedly large clumpy heels, and silk or silk-look stockings, or tights, which Graham thought were unnecessary on such a warm day.
A typical lottery draw often includes several numbers close together, because sequences of six random numbers between 1 and 49 are more likely to be clumpy than not.